Voltage-adjustment means.



No. 851,665. PATENTED APR. 30, 1907. R. P. JACKSON.

VOLTAGE ADJUSTMENT MEANS.

AYYLIOLTIOI rum) mus, 190a.

WITNESSES: INVENTOR ATTORNEY UNITED sTArRs PATENT OFFICE.

RAY P. JAcKsON, or WILKINsBURc, PENNSYLVANIA, AssIeNOR T WRs'r- INeHOUsE ELEOTRIO & MANUFACTURING COMPANY, A CORPORATION OF PENN SYLVAN IA. I

. VOLTAGE-ADJUSTMENT M EI\NS.

Specification of Letters Patent.

' Patented April so, 1907.

Application filed m 9,1906. semi No. 325,345.

To all whom it may concern):

zen of the United States, and'a resident of Wilkinsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Im rovement in Voltage-Adjustment Means, 0 which the following is a specification.

Myinvention relates to voltage regulators,

and particularly to regulators that are adapt ed to vary the active lengths of transformer windings.

The object of my invention is to provide a simple and effective regulator of the character indicated whereby the voltage of. a circuit that is traversed by large amounts of current may be varied without injury to the circuit making and breaking devices;

The single figure of the accompanying drawing 'is a diagrammatic view of a system of distribution that embodies my invention.

Qorresponding terminals of a plurality of switches 1, 2, 3, 4, 5, and 6 at one side, are

I connected by means of spaced leads 7, 8, 9,

10, 11, and 12 to'a transformer-winding 13, that may be supplied with energy from any 1 suitable source, such as a trolley conductor 14 and a track rail 15. The remaining terminals of switches 1 and 4 are connected to one terminal of an inductive winding 16, the remaining terminals of switches 2 and 5 are connected to one terminal of an inductive winding 17 and the remaining terminals of switches 3 and 6 are connected to one terminal of a thirdinductive winding 18, a common magnetizable core 19 being provided for the inductive windings. The remaining terminals of the inductive windings 16, 17 and 18 are connected together and to adistributing circuit conductor 20 between which and another conductor 21', motors 22 or other suitable translating devices may be connected.

The switches 1 to 6 are severally providedwith operating or controlling magnet windings 23, one terminal of each of which is connected to one terminal of a battery 24, the other terminal of the battery being connected to a stationary contact finger 25 of a master controller C. The master controller comprises further, aplurality of stationary'contact fingers 26, 27, 28, 29, 30, and 31 that are connected, respectively, to the remaining terminals of the magnet windings for the "switches 1 to 6, and a movable conducting segment32 that is adapted to engage the stationary contact fingers in positions represented by broken lines a b, c, and d. The

reference characters that are placed opposite the position indicatinglines a, b, c, and d designate the switches that are closed when the conducting segment of the master switch occupies these positions. v

It will be readily understood from the foregoing description thatwhen the conducting segment 32 ofthemaster switchoc cu ies the position a, switches 1, 2, and 3 wil be closed and the inductive windings 16, 17, and 18 will be connected in parallel between the distributing circuit conductor 20 and the points in the transformer winding 7 to which the leads 7, 8, and 9 are connected The volta e applied to the distributing circuit 2021 wil? be then approximately equal to the difference of the potential existing between the transformer lead 8 and the track rail 15. Upon movement of the master switch to the position b, switch 1 opens and switch 4 closes, theinductive winding 16 being thereby disconnected from the transformer lead 7 and connected to the lead 10. After the switch 1 opens and upon closure of the switch 4, the voltage applied to the distributing circuit will be approximately equal to that existing in the transformer at-a point midway between the leads 8 and 9, and after the switch 4 closes, the voltage applied to the distributing circuit will be approximately equal to the difierence of potential existing between the transformer lead 9 and thetrack rail 15. The operation of the regulator will continue substantially as set forth, the terminals of theinductive windings being disconnected, one at a time, from the corresponding transformer leadsand reconnected to others. Since the distributing circuit remains connected to the transformer under all conditions of operation, and since the total amounts .of current traversing the circuits of the inductive windings when they are interrupted are only approximately one-third of the amount that is supplied to the distributing circuit, the amount of arcing at the switches will be insufficient to cause serious injur thereto.

Ot er numbers of inductive windings may be employed and they may be placed upon magnotizahlo cores in any suitable manner other than that shown, and, if desired, the circuits may be controlled by other suitable means, such, for instance, as the well known drum or other type of switch or controller. The arrangements of the circuits and the natures of the devices may be further varied within considerable limits without materially altering the mode of operation or departing from the spirit of the invention.

I claim as my invention:

1. The combination with a series of conductors supplied with progressively differing voltages, of a plurality of inductive windings, one terminal of each of which is connected to a distributing circuit, and-means for connecting the remaining terminals respectively to the said supply conductors.

2. The combination with a series of conductors supplied with progressively differing voltages, of a plurality of inductive windings having a common ma netizable core, one terminal of each of whic is connected to a distributing circuit, and means for connecting the remaining terminals respectively to the said an ply conductors.

3. T 1e combination with a series of conductors sup lied with progressively diilering voltages, o a plurality of inductive windings having a common magnetizable core, one terminal of each of which is connected to a distributing circuit, means for connectin the remaining terminals respectively to said supply conductors, and means for disconnecting the same, one at a time, from the corresponding supply conductors and reconnecting them to others.

4. The combination with a series of conductors su plied with progressivelyv differing voltages, o a plurality of inductive windings, one terminal of each of which is connected to a distributing circuit, means for connecting the remaining terminals respectively to said supply conductors, and means for disconnectin the same, one at a time, from the correspon ing supply conductors re-connect-j in them to others.

11 testimony whereof, I have hereunto subscribed my name this th day of June, 1906.

RAY P. JACKSON.

Witnesses:

Orro S. SGHAIRER, BIRNEY Hmns. 

